Static characteristic of angular velocity measuring transducer for adaptive control systems of hydraulic drives

Abstract

The aim of the research is to obtain the static characteristic of the angular velocity measuring transducer of the developed design and to determine its design parameters. The research methodology provides theoretical substantiation of the static characteristic of the proposed angular velocity measuring transducer with inertial flap and nozzles. The paper considers the principle of operation of various designs of measuring transducers of angular velocity with inertial masses. The variant of constructive execution of angular velocity measuring transducer with inertial flap and nozzles is substantiated, for which the static characteristic is obtained. On the basis of the obtained expressions the main design parameters of the device are determined. The methodology of calculation of static characteristic of angular velocity measuring transducers in the adaptive control system of hydraulic drive is considered. The obtained expression of the static characteristic of the proposed design of the angular velocity measuring transducer connects the external disturbing influence (angular velocity) and the pressure drop in the interthrottle chambers in the steady-state mode of operation. The recommended parameters of the elements of the angular velocity transducer are: nozzle orifice diameter in the range of 0.5–1.5 mm, nozzle face diameter in the range of 1.2–1.5 nozzle orifice diameter, flap stroke up to 0.1 nozzle orifice diameter. It should be noted that at diameters of permanent throttle and nozzle orifices less than 0.5 mm, as well as at the flap movement less than 0.02 mm, obliteration may occur, i.e. overgrowing of resistance passage sections by polarised liquid molecules, which breaks the performance of the angular velocity transducer. The obtained expression of the static characteristic of the proposed design of the angular velocity transducer with an inertial flap and nozzles allows us to determine the design parameters of its elements and, on their basis, the dynamic characteristics.

Keywords

• hydroficated equipment
• automatic control system
• angular velocity sensor
• speed controller
• nozzle-flap
• static characteristic
• sensor parameter ratio